Saving image at runtime

[padma patil]

Hi,
I am generating some graph in Applet mainly using drawLine() and drawOval() methods and now wanted to save the graph ( which I can view from appletviewer )as image(.bmp or jpeg format).
I realy don't have clue about this. Does anybody knows?
-
padmashree

[David G Risner]

First, you should double-buffer your drawing. That is, do all of your drawing into an Image object and then paint that Image.
Second, get the JPEG Encoder from Obrador: http://www.obrador.com/essentialjpeg/jpeg.htm
Third, you can use something like the following method to write the Image as a JPEG to an OutputStream:

protected void writeForSaving(java.io.OutputStream os) throws java.io.IOException {
    jpegencoder.JpegEncoder jpegEncoder = new jpegencoder.JpegEncoder(bufferImage, 90, os);
    jpegEncoder.Compress();
  }
 

Of course, getting permission to create a file from an applet is a whole other can of worms....

[padma patil]

Thanks.
I am using JpegEncoder to save image. it works.
I have used policy file to grant File access to Applet.
I have posted another question for "loading policy file from Applet"

Let me know your feedback
-
padmashree